Which of the following has proved helpful in preserving pollen of fossils

Options

A. Oil content
B. Cellulosic intine
C. Pollen kit
D. Sporopollenin

Answer

D

Explanation

Sporopollenin has proved helpful in preserving pollen as fossils . The covering of pollen grain sporoderm is consist of two layer , viz., exine and intine . Exine is made of a highly resistant fatty substance called sporpollenin.
It could not be degraded by any enzyme . it is not affected by high temperature , strong acid or strong alkali . Thus , it keeps the pollen grains well-preserved as fossils .
Pollenkitt is a yellowish , viscous , sticky and oily layer that covers exine of some insect pollinated pollen grains . Intine of pollen grains is made up of pectin and cellulose .